Bitcoin mining companies MARA and Hut 8 have significantly increased their Bitcoin holdings, with MARA purchasing a total of 15,574 BTC for approximately $1.53 billion, raising its treasury to 44,394 BTC valued at over $4.4 billion. Hut 8 added 990 BTC for about $100 million, bringing its total to 10,096 BTC. Both firms rank among the top six publicly traded companies by Bitcoin holdings, despite recent declines in their stock prices amid a broader market downturn.